From the blurb accompanying the video:
"The Eye of Quebec (Lac Manicouagan) is visible from space as a perfectly ring-shaped lake. Its center island is far larger than the water that surrounds it. 100km in diameter, it is the fourth largest meteor impact site on earth. We sailed around it and think that was the first ever circumnavigation of the reservoir under sail and oar. (We can find record of two other sailboats that have attempted the trip. While we're not sure of their success, both appeared to carry auxiliary engines. If it wasn't the wind pulling us it was our backs.)
Three years ago, when John and I drove the Trans-Labrador highway, we camped one night on the shores of the great Manicouaga and it captured our imaginations. Finally, this year, aboard the expedition re-fitted Wayfarer 4610, we made the voyage. We were on the water for about twelve days after a two day drive north. It is an astronomically great lake.
We camped ashore every night, and packed nearly 100 Ibs of dried food for the journey. We wore drysuits most of the time, cause the weather was typically cold and wet!
Circumanic Higher Res from Scott McDougall on Vimeo.
More information on the "Eye of Quebec" from Wikipedia.